IMO, if this family insists on keeping this brain-dead, not coming back to life child on a ventilator, it's going to cost them their life savings plus. It's over, folks. Yes, it's emotional. Yes, it's sentimental. Yes, you are sad. That isn't going to bring her back. Figure out what your best course of action should be and take it. Have this be ABOUT the child, not about your inability to let go.